What is "broutona"

Broutona (; Japanese 武魯頓島; Buroton-tō) is an uninhabited volcanic island located near the northern end of the southern Kuril Islands chain in the Sea of Okhotsk in the northwest Pacific Ocean. Its name is derived from William Robert Broughton, a British American ship captain who charted many of the Kuril Islands during his voyages during the 19th century. Its original Ainu name was Makanruru, which translates roughly to "island in a strong current".